Margaeet e



(No Model.)

B. s. STEVENSyDecd.

. [STE s, Executrix.

SH TEN ER.

No. 539,653. Patented May 21, 1895.

UNITED STATES EDWIN S. STEVENS, OF OORNISH, MAINE; MARGARET E. STEVENS EXECUTRIX.

PATENT OFFICE.

OF SAID EDWIN STEVENS, DECEASED.

SASH-FASTEN ER.-

SPECIFICATION forming partof Letters Patent No. 539,653, dated May 21, 1 895. Application filed March 28, 1894; Serial No. 505,406. (No model.)

To all whom it may concern:

Be it known that I, EDWIN S. STEVENS, a citizen of the United States of America, residing at Cornish, in the county of York and State of Maine, have invented certain new and useful Improvements in Sash-Fasteners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in sashfasteners, and especially to fasteners adapted to lock and unlock the upper and lower sashes simultaneously.

It consists in a suitable case adapted to be attached to the top of the lower sash, and having mounted therein movable locking arms pivotally attached together, and adapted to he slid into engagement, one with the upper sash and the other with the jamb. Said case has in the top a slot extending diagonally therein, and a guiding pin attached to said locking arms at the pivot point, and extended up through said slot, and terminating in a knob for operating the arms.

It also consists in certain details of construction, which will be hereinafter more fully set forth and specifically claimed.

In the drawings herewith accompanying and making a part of this application, Figure 1 is a sectional view of a window with my fastener attached, taken on a horizontal line passing through the sash-fastener case when in position. Fig. 2 is a bottom plan view of the sash-fastener and case. Fig. 3 is a plan view of the same. Fig. 4 is an elevation of the knob on the top of the case. Fig. 5 is an elevation of the screw which forms the pivot of the locking-arms and which carries the knob. Fig. 6 is an end View of the grommet; and Fig. 7 is a sectional view of the same, showing the curved socket.

Same letters refer to like parts.

In said drawings a represents the upper sash; b, the lower sash; c, the window jamb; d, the bead; e, the cord, and f the facing strip.

Attached to the top of the lower sash is a suitable case h, one side and the end being in contact with the upper sash and jamb, respectively, as seen in Fig. 1. The case 71. has

an opening i in the side, and an openingj in the end.

At points in the upper sash and in the jamb opposite said openings 1' andj, are made curved sockets Z and m. These sockets may be made in the wood, or they may have metallic keepers containing the socket inserted in the wood of the sash and jamb, as seen in sash a in Fig. 1.

Two curved locking arms are pivotally attached to each other, the pivot 77. extending upwardly through a slot 0 extending diagonally in the face of the case, and serving to guide the movement of the arms, and said pivot has attached to the top thereof a handle or knob p, by means of which the locking arms are operated.

The curved locking arms have substantially the same curvature as the sockets or keepers in the sash and jamb, into which they are adapted to be forcedin order to lock the sash.

The position of the locking arms when the sash are unlocked is shown in Fig. 3, and their position when locked is shown by dotted lines in Fig.2, and also in Fig. 1.

The keepers and locking arms being curved, the sockets may be so curved with respect to the locking arms that as they are forced into said sockets, they tend to draw the two sash together, thus preventing them from rattling, and preventing the admission of cold and dust between them.

The operation of my improved sash fastener is as follows: To look the sash,push the knob forward in the slot until the ends of the locking arms enter the sockets in the sash and j amb, respectively, as seen in Fig. 1. The guiding pin of the locking arms, projecting through and being guided in the slot in the case, cannot .move laterally. Consequently, if the inner edge of the locking arm be curved so as to bear upon the wall of the socket when the locking arm is thrust into the Socket, it tends to draw the two sash together, thus making a close joint between them.

Theadvantages of my improved sash fastener are simplicity, cheapness and durability. Both sash are locked and unlocked simultaneously, and the locking of the sash prevents the sash from rattling and makes a tight joint between them. It will also be evident that a series of keepers may be set in the sash and jamh and thus the lower sash may be raised or the upper sash lowered to any desired position and locked.

Having thus described my invention and its use, I claim In a sash fastener the combination of a suitable ease having a slot extending diagonally therein and suitable openings at the side and end, with curved locking arms pivot-ally attached to each other at one end and with their free ends projecting loosely through said openings and adapted to enter curved sockets in the sash and jamh and aguide pin carried by said arms and projecting through said slot, substantially as and for the purposes set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

EDWIN S. STEVENS. Witnesses:

NATHAN CLIFFORD, \V. CHAMBERLANE. 

